JP3237253U - Box-shaped retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retain a backfilled soil at the top end of a box-shaped retaining wall with a block for a retaining wall at the uppermost stage without additionally constructing a gravity retaining wall. We will provide a box-shaped retaining wall that reduces labor and shortens the construction period. SOLUTION: A box-shaped retaining wall includes a plurality of steps stacked in a staircase shape, and each step includes an upright surface plate 2, a backing plate 3 standing apart from the rear of the surface plate, and a surface plate. A plurality of retaining wall blocks 1 including two connecting plates 4 for connecting the intermediate portions in the left-right direction of the holding plate are arranged in the horizontal direction, and the granular filler 6 is placed in the space behind the surface plate 2. Is filled and constructed. The height of the surface plate 2 of the uppermost retaining wall block 1 in a predetermined column is higher than that of the other retaining wall blocks by the upper extension 2a, and the upper extension 2a is the backfilled soil 7 Functions as an earth retaining version of. [Selection diagram] Fig. 1

Description

The present invention relates to a box-shaped retaining wall.

As shown in FIG. 6, the box-shaped retaining wall known as Patent Document 1 or the like has a concrete retaining wall block 51 including a surface plate 52, a backing plate 53, and two connecting plates 54 connecting them laterally. A plurality of steps are arranged in the direction, and the space between the surface plate 52 and the retaining plate 53 is filled with a granular filler 56 such as a single-grain crushed stone to form one step, and the steps are arranged in a plurality of steps from the bottom to the top. And it is built by stacking in a staircase pattern.

In the standard retaining wall block 51, the height of the surface plate 52 is about 1000 mm, and the height of the latter half of the holding plate 53 and the connecting plate 54 is about 500 mm. The lower end surfaces of the surface plate 52, the holding plate 53, and the connecting plate 54 are flush with each other.

At the top end of the box-shaped retaining wall, the height of the upper surface of the backfilled soil 57 may exceed the surface plate 52 of the uppermost retaining wall block 51 by 1 to 1000 mm. The height of the upper surface of the backfilled soil 57 changes in the lateral direction in some places-that is, in some places with a slope. In such a case, a gravity type retaining wall 60 is additionally constructed by cast-in-place concrete above the uppermost retaining wall block 51, and the backside backfill soil 57 exceeding the surface plate 52 is retained. ..

Japanese Unexamined Patent Publication No. 2004-76343

As described above, it takes a lot of time and effort to additionally construct the gravity type retaining wall 60 by cast-in-place concrete, and there is a problem that the construction period becomes long.

Therefore, the purpose of the present invention is to make it possible to retain the backfilled soil at the top of the box-shaped retaining wall with the uppermost retaining wall block, and to use the gravity type. The purpose is to eliminate the need to construct additional retaining walls, reduce labor, and shorten the construction period.

The present invention includes a plurality of steps stacked in a staircase pattern, and each step includes an upright surface plate, a retaining wall standing apart from the rear of the surface plate, and a left-right intermediate portion of the surface plate and the holding plate. In a box-shaped retaining wall constructed by arranging a plurality of retaining wall blocks including two connecting plates connecting each other in the horizontal direction and filling a space behind the surface plate with a granular filler. ,
The uppermost retaining wall block in a predetermined column has a higher surface plate height by an upward extension than the other retaining wall blocks, and the upper extension serves as an earth retaining plate for backfilling soil. It is characterized by being functional.

Here, the upper edge of the surface plate of the uppermost retaining wall block may be inclined according to the gradient of the backfilled soil. There is an advantage that the corners of the face plate do not protrude with respect to the backfilled soil.

According to the present invention, when it is necessary to retain the backfilled soil at the top of the box-shaped retaining wall, it can be retained with the uppermost retaining wall block, and a gravity type retaining wall is additionally constructed. Since it is not necessary, it is possible to reduce the labor and shorten the construction period.

FIG. 1 is a perspective view showing a box-shaped retaining wall of the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a perspective view of the four types of retaining wall blocks used in Examples 1 and 2 as viewed from the front side. FIG. 4 is a perspective view of the four types of retaining wall blocks used in Examples 1 and 2 as viewed from the rear side. FIG. 5 is a perspective view showing the box-shaped retaining wall of the second embodiment. FIG. 6 is a perspective view showing a conventional box-shaped retaining wall.

1. 1. Block for retaining wall of other stage For the block for retaining wall of other stage, the above standard retaining wall block (height of surface plate is 1000 mm, height of the latter half of the retaining plate and connecting plate is 500 mm) is used. In addition to this, retaining wall blocks with modified standard dimensions (eg, each height modified in the range of 50-200%) can also be used. However, the height of the surface plate is preferably larger than the height of the latter half of the holding plate and the connecting plate.

2. 2. Top-level retaining wall block Here, the "top-level" is the top-level level in a predetermined column, and is not limited to the top-level level of the entire box-shaped retaining wall. The uppermost retaining wall block is provided with an upward extension by extending the height of the surface plate of the standard retaining wall block upward (when the above standard retaining wall block is used for other steps). In addition to being able to use a retaining wall block (when using a retaining wall block with the above dimensions changed in another stage), the height of the changed retaining wall block is extended upward to provide an upward extension. Can be used. The vertical dimension of the upper extension (the vertical dimension of the uppermost extension when the upper edge of the surface plate is inclined) is not particularly limited, but is preferably 1 to 1000 mm, more preferably 50 to 1000 mm.

3. 3. Granular filler The granular filler is not particularly limited, but crushed stone, chestnut stone and the like can be exemplified, and single-grain crushed stone is preferable. More specifically, the following can be exemplified.
・ Crushed stone for roads: JIS A5001-2008, S-30 (No. 4) 30 to 20 mm, S-40 (No. 3) 40 to 30 mm, S-60 (No. 2) 60 to 40 mm
・ Crushed stone for concrete: JIS A5005-2009, crushed stone 4020
・ Split stone: JIS A5006-1995, particle size 50-150 mm

Examples of the present invention will be described with reference to the drawings. The structures, materials, numerical values, shapes and dimensions described in the examples are examples and can be appropriately changed as long as they do not deviate from the gist of the invention.

[Example 1]
The box-shaped retaining wall of Example 1 shown in FIGS. 1 and 2 is composed of a plurality of steps (five steps in the illustrated example) stacked in a staircase pattern. In each stage, a plurality of retaining wall blocks 1 shown in FIGS. 3 and 4 arranged in the horizontal direction and a granular filler 6 (for example, single-grain crushed stone S-40) filled in the vacant spaces of all retaining wall blocks 1 are provided. ) Is constructed by.

The retaining wall block 1 connects an upright surface plate 2, a backing plate 3 that stands up behind the surface plate 2, and a left-right intermediate portion of the surface plate 2 and a left-right intermediate portion of the back plate 3. The two connecting plates 4 are integrally precast with concrete.

In the construction site of this embodiment, if all stages are constructed with the standard retaining wall block described later, the height of the upper surface of the backfilled soil 7 slopes to a part at the top of the box-shaped retaining wall. It is a construction site that exceeds the surface plate of the uppermost retaining wall block by 1 to 1000 mm.

Therefore, the height of the surface plate 2 of the uppermost retaining wall block 1 in the predetermined column is higher than that of the other retaining wall blocks 1 by the upper extension 2a, and the upper extension 2a fills the back surface. It is supposed to function as an earth retaining version of the returned soil 7. The details are as follows.

<Block for retaining wall in other stages>
Each (a) of FIGS. 3 and 4 shows a retaining wall block 1 in another stage (and the uppermost stage other than the predetermined column), and is a standard product having the following dimensions.
The surface plate 2 is a rectangular plate having a left-right length of about 2000 mm, a vertical length of about 1000 mm, and a thickness of about 120 mm. Is formed with a drainage recess 5.
The holding plate 3 is a rectangular plate having a left-right length of about 1865 mm, a vertical length of about 500 mm, and a thickness of about 120 to 140 mm.
-The connecting plate 4 has a front-rear length of about 1000 mm, a vertical length of about 500 mm at the rear including at least the latter half (a range of a front-rear length of about 660 mm), and an upward extension at the front part (a range of a front-rear length of about 240 mm) following the rear part. It is a plate having a vertical length of about 900 mm and a thickness of about 100 mm, which extends diagonally upward at the front end portion (range of a front-rear length of 100 mm) following the front portion and is connected to the upper end of the surface plate 2.

Therefore, the upper end surface of the holding plate 3 and the upper end surface of at least the latter half of the connecting plate 4 are at a level of ½ of the height of the surface plate 2, and the lower end surface of the holding plate 3 and the lower end surface of the connecting plate 4 are formed. It is at the same height level as the lower end surface of the surface plate 2. The outer surface of each connecting plate 4 is about 390 mm inward from each side end surface of the surface plate 2, and the inner side surfaces of both connecting plates 4 face each other in parallel with a mutual spacing of about 1010 mm. Therefore, between the surface plate 2 and the backing plate 3, there is a central vacant space and left and right side recesses. In addition, there is a space behind the backing plate 3 (between the slope 9 and the slope 9).

<The top retaining wall block in a given column>
Each (b) to (d) of FIGS. 3 and 4 shows three types of retaining wall blocks 1 used in the uppermost stage in a predetermined column, and is the surface plate 2 of the standard retaining wall block 1. The height is extended upward to provide an upward extension 2a, and the others are the same as the above standard product. The upper extension 2a is integrally precast as an extension of the surface plate 2. In addition, patterns such as stone wall patterns and groove patterns are provided on the surface of the upper extension 2a to ensure continuity of the design up to the top of the box-shaped retaining wall.

-In the first type shown in each (b) of both figures, the vertical dimension of the upper extension 2a gradually increases from 100 mm at one end on the left and right to 500 mm at the other end, so that the height of the surface plate 2 increases from 1100 mm to 1500 mm. Gradually, the upper edge of the face plate is inclined to match the gradient of the backfill soil 7.
-In the second type shown in each (c) of both figures, the vertical dimension of the upper extension 2a gradually increases from 600 mm at one end on the left and right to 900 mm at the other end, so that the height of the surface plate gradually increases from 1600 mm to 1900 mm. Then, the upper edge of the surface plate is inclined so as to match the gradient of the backfill soil 7.
-In the third type shown in each (d) of both figures, the vertical dimension of the upper extension 2a is constant at 1000 mm, and therefore the height of the surface plate is constant at 2000 mm.

In the box-shaped retaining wall of this embodiment, of the seven columns shown in FIG. 1, the standard product of (a) above, the fourth, is in the fifth (top) of the first to third columns from the right. The 5th row (top row) of the column is the 1st type of the above (b), and the 5th row (top row) of the 5th column is the 2nd type of the above (c), the 5th row of the 6th to 7th columns. The third type retaining wall block 1 of the above (d) is used for the eyes (top), and in the 4th to 6th, the upper extension 2a is a retaining plate that matches the slope of the backfilled soil 7. It is designed to function as.

In order to construct the box-shaped retaining wall of this embodiment, first, the standard retaining wall blocks 1 are arranged side by side, and the vacant spaces behind the surface plate 2 (the central vacant space, the side recesses, and the back) are arranged. The granular filler 6 is filled in the space) to form the first stage. Next, the second stage, which is recessed 100 mm or more from the first stage on the first stage, is formed in the same manner as the first stage. Further, the third to fourth stages and subsequent stages are formed in the same manner as the second stage. Then, as described above, the standard product or the three types of retaining wall blocks 1 are used properly to form the fifth stage (the uppermost stage in the illustrated example) in the same manner as the second to fourth stages, and the backfill soil is backfilled with the upper extension 2a. It will be completed if 7 is retained.

[Example 2]
In the box-shaped retaining wall of Example 2 shown in FIG. 5, among the seven columns shown in the figure, the standard product 2 of the above (a) is in the fourth row (top row) of the first column from the right. The 4th row (top row) of the second column is the 1st type of the above (b), and the 4th row (top row) of the 3rd column is the 5th row of the 2nd type and the 4th column of the above (c). The eyes (top row) are the 5th row (top row) of the 1st type and 5th column of the above (b), and the 5th row (top row) of the 2nd type and 6th to 7th columns of the above (c). ), The third type retaining wall block 1 of the above (d) is used respectively, and in the 2nd to 6th, the upper extension 2a functions as an earth retaining plate matching the gradient of the backfilled soil 7. It has become.

In addition, there is a small edge between the upper extension 2a of the uppermost retaining wall block 1 in the third column and the surface plate 2 of the uppermost retaining wall block 1 in the fourth column. , The edge-stopping concrete 8 that closes the edge is cast on site. Others of Example 2 are the same as those of Example 1. Example 2 is suitable when the gradient of the backfill soil 7 continues for a long time.

According to Examples 1 and 2 constructed as described above, the backside backfill soil 7 can be retained by the uppermost retaining wall block 1, and it is not necessary to additionally construct a gravity type retaining wall. It is possible to reduce labor and shorten the construction period.

The present invention is not limited to the above embodiment, and can be appropriately modified and embodied without departing from the gist of the invention.

1 Retaining wall block 2 Surface plate 2a Upward extension 3 Holding plate 4 Connecting plate 5 Drainage recess 6 Granular filler 7 Back backfill soil 8 Edge stop concrete 9 Slope

Claims (2)

It includes a plurality of steps stacked in a staircase pattern, and each step includes an upright surface plate (2), a retaining wall (3) standing apart from the rear of the surface plate, and the surface plate and the retaining plate in the left-right direction. A plurality of retaining wall blocks (1) including two connecting plates (4) connecting the intermediate portions are arranged in the horizontal direction, and a granular filler (granular filler (2) is used in the space behind the surface plate (2). In the box-shaped retaining wall constructed by filling 6),
The height of the surface plate (2) of the uppermost retaining wall block (1) in a predetermined column is higher than that of the other retaining wall blocks by the upper extension (2a), and the upper extension (2a) is higher. A box-shaped retaining wall characterized in that 2a) functions as an earth retaining plate for backfilled soil (7). The box-shaped retaining wall according to claim 1, wherein the upper edge of the surface plate (2) of the uppermost retaining wall block (1) is inclined according to the gradient of the backfilled soil (7).

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